6 • Carel IR33+ Controller - Basic Case Operations
CAREL IR33+ CONTROLLER
Basic Case Operations
1. The case’s condensing unit (mounted on top of the case if a Hybrid
™
) cycles off and on during normal operation. When the inside of the
case is warm, the compressor turns on. When the inside of the case is cold, the compressor turns off.
2. On medium temp cases, the fans run all of the time. On low temp cases, the fans run when the evaporator temperature is below 30ºF,
except when in defrost.
3. The freezer case goes into defrost one or two times per day and lasts between 30 and 40 minutes. The Ice Merchandiser goes into defrost
one time per day and lasts for 40 minutes. At the end of the defrost, the low temp doors may fog on the inside. This is normal. During the
defrost, the air in the ducts can warm up to 40ºF for a medium temp case and 60ºF for a low temp case. Product temperatures within the
case will not rise above acceptable levels, however. Product in medium temp cases will remain at or below 41ºF and product inside low
temp cases will remain frozen.*
4. The lights remain on at all times unless the light switch located in the right-hand door frame is switched off.
5. The water removal system has a maximum capacity of two gallons. When cleaning the interior of the case, do not use more than this
amount of liquid.
*PleaseconsulttheZeroZoneServiceDepartmentoncasedefrostcharacteristicsfornon-standarddefrostsettings.
Silencing the IR33+ Temperature Alarm
See "Manager’s
Emergency Guide"
at the end of this
manual.
The button used to silence the alarm ([PRG] button) is located on the controller on the front of the case above the right-hand door.
If the alarm sounds, push the [PRG] button which will reset the alarm and silence it for one hour.
